Solar activity retreated this week, with the average daily sunspot numbers off nearly 46 points -- about 35 percent -- to 83.1, while the average daily solar flux declined 18 points to 118.9. Learn More

Both the solar flux and sunspot numbers reached a short term low on April 8-11, but they are now rising again. For the past week -- April 12-18 -- the average daily sunspot numbers more than doubled, compared to the previous seven days, rising more than 3 Learn More